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Circulating extraction method for extracting and purifying hesperidin from orange residues

A technology of cyclic extraction and hesperidin, which is applied in the field of natural product separation, can solve problems such as pollution and waste, and achieve the effects of reducing pollution, low cost and saving water sources.

Active Publication Date: 2014-01-01
广西天顺祥药业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing alkali-acid extraction method, the lye that dissolves hesperidin is discharged as waste water after acid precipitation, causing pollution and waste

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] The first use: Take 1kg of citrus pomace, add 2 times the volume of saturated lime water, soak and stir for 2 hours, squeeze and filter (200-400 mesh), adjust the pH to 10.0-13.0 with lime milk during soaking; add 1.5 Soak in twice the volume of saturated lime water and stir for 2 hours, squeeze and filter (200-400 mesh); combine the filtrates, adjust the pH to 2.0-5.0 with hydrochloric acid or nitric acid, leave for 12-24 hours, take the supernatant Ⅰ for later use, and filter the precipitate (400 mesh), 6-7g of crude product was obtained with a purity of 65%-75%.

[0032] Take the above crude product, add the sodium hydroxide solution with a weight volume ratio concentration of 1.2% according to the weight ratio of the crude product and sodium hydroxide solution 1:12, stir until dissolved, filter (400 mesh), remove insoluble matter, take the filtrate, Adjust the pH to 2.0-5.0 with a nitric acid solution with a content of 5% by weight, keep it warm at 60°C for 15-30 mi...

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Abstract

The invention discloses a circulating extraction method for extracting and purifying hesperidin from orange residues. The method comprises the steps of crude extraction and purification, breaks limitations of a raw material, solves problem of garbage produced in orange production and livelihood, successful changes waste into treasures and realizes recycled and economic use; through the research on the raw material, an alkali-acid extraction method is utilized and saturated lime water is used as a resolution solvent according to the characteristics of the raw material, the raw material source is stable, and the cost is relatively low; the precipitating action of the raw material on impurities such as pectin in the orange residues is utilized to further improve the treatment efficiency, so that the extraction, separation, purification and refining of the hesperidin are facilitated; according to the method, lime water wastewater subjected to resaturation through quicklime is further fully used to again extract the hesperidin, under the condition of not influencing the purification quality, the water source is saved, the sewage discharge amount is reduced, pollution to the surrounding environment is reduced, the production cost and sewage treatment cost of enterprises are reduced, and the product purity is relatively high.

Description

technical field [0001] The invention belongs to the technical field of separation of natural products, in particular to a separation technology of plant effective components, in particular to a recycling method for purifying hesperidin from orange pomace. Background technique [0002] Citrus is a widely planted fruit. Citrus contains hesperidin. Existing methods extract it from tangerine peel or Citrus aurantium, and the extraction methods are mostly water-alcohol extraction and alkali-acid extraction. [0003] Hesperidin, also known as hesperidin and tangeridin, belongs to natural flavonoids, its pure product is white needle-like crystal or light yellow powder, bitter in taste, warm in nature, molecular formula C 28 h 34 o 15 , molecular weight 610.57, melting point 258-262 ° C, almost insoluble in cold water, but has a large solubility in ethanol or hot water, soluble in pyridine, glycerin, acetic acid or dilute alkali solution, insoluble in chloroform, acetone, ether or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H17/07C07H1/08
Inventor 黄亮代军平杨帆
Owner 广西天顺祥药业有限公司
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